- Joined
- Jul 2, 2014
- Messages
- 7,594
You cannot really check the compression on an engine that has not been run in years. It will not have oil in the rings and on the cylinders, and may have some rust on the bores. You will not learn much. As John says above, turn it over with the spark plugs out and test for compression with your thumb, turning the engine over by hand, If it pushes air past your thumb on all cylinders then it has enough to start the engine. If the engine truly turns over freely, squirt some oil in the cylinders, change the oil in the crankcase, drain any fuel from the tank and lines and clean them if they do not flow freely, fix your ignition problems, and start it up and find out what you have there...